DEM study of the effect of fines content on the small-strain stiffness of gap-graded soils

被引：53

作者：

Gong, Jian ^{[1
]}

Wang, Xiang ^{[1
]}

Li, Liang ^{[1
]}

Nie, Zhihong ^{[1
]}

机构：

[1] Cent S Univ, Sch Civil Engn, Changsha 410075, Hunan, Peoples R China

来源：

COMPUTERS AND GEOTECHNICS | 2019年 / 112卷

基金：

芬兰科学院; 中国国家自然科学基金;

关键词：

Gap-graded soils; Binary mixtures; Small-strain stiffness; Fines content; DEM; Triaxial tests; Fundamental mechanism; SHEAR-WAVE VELOCITY; STEADY-STATE; LOOSE SAND; GRANULAR MIXTURES; BEHAVIOR; STRENGTH; STRESS; LIQUEFACTION; SIMULATIONS; DILATANCY;

D O I：

10.1016/j.compgeo.2019.04.008

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

This letter examines the effect of fines content on the small-strain stiffness (G(0)) of gap-graded soils via the discrete element method (DEM). The G(0) values were obtained by DEM simulations of drained triaxial tests. Microscopic analysis reveals that the G(0) uniquely depends on the mechanical coordination number (CN) of the soils. Furthermore, modified CNs that consider coarse-coarse, coarse-fine and fine-fine contact in the sample are quantified, partially reflecting the contribution of each contact type to G(0). The results indicate that as fines content increases, the fines begin to participate in the force chains and their contribution to G(0) should be considered.

引用

页码：35 / 40

页数：6

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